package cn.e3mall.cart.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import cn.e3mall.cart.controller.CartController;
import cn.e3mall.common.util.CookieUtils;
import cn.e3mall.common.util.E3Result;
import cn.e3mall.pojo.TbUser;
import cn.e3mall.sso.service.TokenService;

/**
 * 用户登录处理拦截器
 * @author Administrator
 *
 */
public class LoginInterceptor implements HandlerInterceptor {

	@Autowired
	private TokenService tokenService;
	
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		//前处理，执行handle之前执行此方法
		//返回true，放行 false，拦截
		//1、从cookie中取token
		String token = CookieUtils.getCookieValue(request, "token");
		//2、如果没有token，未登录状态,直接放行
		if(StringUtils.isNoneBlank(token)) {
			return true;
		}
		//3、取到token，需要调用sso系统的服务，根据token取用户信息
		E3Result e3Result = tokenService.getUserByToken(token);
		//4、没有取到用户信息，登录过期，直接放行
		if(e3Result.getStatus() != 200) {
			return true;
		}
		//5、取到用户信息，登录状态
		TbUser user = (TbUser) e3Result.getData();
		//6、把用户信息放到request中，只需要在controller中判断request中是否包含user信息，放行
		request.setAttribute("user", user);
		return true;
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		//handle执行之后，返回ModelAndView之前
		
	}

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		//完成处理，返回ModelAndView之后
		//可以在此处理异常
		
	}

}
